Draw the circuit diagram of complementary symmetry Class B push-pull amplifier and describe its working.

Draw the circuit diagram of complementary symmetry Class B push-pull amplifier and describe its working.
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Answer :

Diagram of complementary symmetry Class B push-pull amplifier:

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Working: The above circuit employs a NPN transistor and a PNP transistor connected in push pull configuration. When the input signal is applied, during the positive half cycle of the input signal, the NPN transistor conducts and the PNP transistor cuts off. During the negative half cycle, the NPN transistor cuts off and the PNP transistor conducts.

In this way, the NPN transistor amplifies during positive half cycle of the input, while PNP transistor amplifies during negative half cycle of the input. As the transistors are both complement to each other, act symmetrically while being connected in push pull configuration of class B, this circuit is termed as Complementary symmetry push pull class B amplifier.

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